Stone-dressing machine



(No Model.)

J. W. MALOY.

STONE DRESSING MACHINE.

No. 351.059. Patented Oct. 19, 1886.

N. PEYEHS. Fhcln-Lilhngnpher. Walhinginn, D. C.

UNITED STATES PATENT FFICEO JAMES V. MALOY, OF SOMERVILLE, MASSACHUSETTS.

STONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 351,059, dated ()ctcber 19, 1886.

Application filed December 18, 1885.

T0 aZZ whom, it may concern:

Be it known that I, J urns W. MALoY, a citizen of the United States, and a resident of Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Tools for Stone-Cutting Machines, of which the follow ing is a specification.

My invention relates to a tool for cutting stone in that class of machines by which curved grooves or cuts areproduced; and my improved tool consists of a head or support to which are clamped or confined a series of plates or blades bentto conform to the circle or curve traveled by the tool and arranged to operate with their edges upon the slab to be cut.

In the drawings, Figure 1 is a plan showing one form of my improved cutter. Fig. 2 is a plan showing another form. Fig. 8 is a side elevation of Fig. 2. Fig. at is a section showing the operation of the tool on a slab. Fig. 5 is a section showing a modification; Fig. 6, a sectional elevation of a machine, showing one manner of using the tool.

The improved tool consists, essentially, of a frame or head, a series of curved plates or blades, and clamping or securing devices by which said plates are confined to the head, so that the edges of the blades will be presented to form the working-edges of the tool.

The head A is suitably constructed to afford a bearing for the curved blades B, which may be each bent to form a ring or a part of a ring. In the construction shown in Fig. 1 each blade is bent to the form of a circle; in the constructlon shown in Fig. 2 each blade is bent to form part of a circle, the bearing of thehead in Fig. 1 being circular, and in Fig. 2 each separate bearing being part of a circle.

Two or more blades are placed one upon the other,according to the thickness of cutter and width of cut desired, and all are clamped or otherwise secured to the head, so as to permit ready detachment. Thus in Fig. 1 the blades are secured by a ring-clamp, D, consisting of three sections with terminal ears a a, through which extend screws, whereby the annular clamp may be contracted to bind the parts in place. In Fig. 2 the sectional curved blades Serial No. 186,021. (No model.)

are secured to their bearings by screw-bolts I) passing through slots 00, and which permit the vertical adj ustmentbf each blade.

By arranging the blades at different heights the edge of one blade is caused to project be yond the other, as shown in Fig. 3, so that when the edge of the tool is brought against a slab, X, Fig. 4, and the head is rapidly rotated a curved or circular groove will be cut in the slab with ogee edges. This action is particularly desirable when a slab is severed to form a circular opening and remove a central portion, the tool thus cutting the edge of the opening and the edge of the. slab to an ornamental shape.

In some instances two tools may operate from opposite sides, as with the machine shown in Fig. 6, which need not here be particularly described, as it forms the subject of a separate application for Letters Patent.

One of the main advantages of this tool is the ease with which it may be built up to any desired thickness and repaired and the parts adjusted to cut the edge of the slab to any desired shape. It will also be evident that the tool can be cheaply made by using flat blades of cheap material and bending them to form against their bearings.

The blades may be placed one directly against the other, as shown in Fig. 4; or there maybe intervening distance-pieces, s, of wood, metal, or elastic material, as rubber, thereby affording more room for the sand to get to the cutting-edges.

In my applications Nos. 180,753 and 186,190, filed October 23, 1885, and December 19, 1885, respectively, I have shown and described cutter-heads consisting of curved blades adjustably clamped together with the cutting-edges arranged on different planes. These features in themselves are not claimed in said applications, but are hereinafter claimed.

\Vithout limiting myself to the precise construction and arrangement of parts shown, I claim 1. The cutter head having one or more curved bearings, in combination with one or more independent cutters, each cutter c0nsistin g of a series of cu rved cutting-blades clamped to and independently adjustable on said bearings, said blades projecting at right angles to the plane of rotation ,substantiall yas described. 2. The cutter-head, in combination with a 5 series of similar bent rigid cuttingblades securedthereto at right angles to the plane of rotation, the edge of one blade projecting beyond those of the others, substantially as described. I 7

3. The combinati0n,with a cutter-head, of a series of independently-ad j ustable curved rigid blades arranged at right angles to the plane of rotation, and oneinclosing the other, the edges forming a cutting -facc, substantially as de- I 5 scribed. 7

4. The combination,with a cutter-head, of a series of curved adjustable rigid blades, one adjacent to the other, substantially as described, and set with their cuttingedges in different planes of projection, substantially as 20 and for the purpose set fort In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES W. MALOY.

WVitnesses: I

H. O. DERBY, ALFRED ScHoFF. 

